{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://x402receipts.com/spec/arr-1/receipt.schema.json",
  "title": "ARR-1 receipt (submission form)",
  "description": "A single purchase made by an autonomous agent, as submitted to an ARR-1 issuer. Amounts may be given either in human form (amount + currency) or atomic form (amountAtomic + asset); an issuer normalises atomic to human before computing the fingerprint.",
  "type": "object",
  "required": [
    "id",
    "occurredAt",
    "network",
    "resource",
    "method",
    "requestHash",
    "delivered"
  ],
  "additionalProperties": true,
  "properties": {
    "id": {
      "type": "string",
      "minLength": 8,
      "maxLength": 128,
      "description": "Unique id for this purchase, chosen by the agent. A UUID is recommended. Submitting the same id twice MUST NOT create a second record."
    },
    "occurredAt": {
      "type": "string",
      "format": "date-time",
      "description": "When the purchase happened, ISO 8601 with timezone."
    },
    "network": {
      "type": "string",
      "description": "CAIP-2 identifier of the network the payment settled on, e.g. eip155:8453."
    },
    "payer": {
      "type": [
        "string",
        "null"
      ],
      "description": "Address the payment left. When omitted, the issuer fills it in from the settled payment."
    },
    "payee": {
      "type": [
        "string",
        "null"
      ],
      "description": "Address the payment went to: the supplier's payTo."
    },
    "amount": {
      "type": [
        "string",
        "null"
      ],
      "pattern": "^-?[0-9]+(\\.[0-9]+)?$",
      "description": "Amount in human units, as a decimal string. Never a JSON number."
    },
    "currency": {
      "type": [
        "string",
        "null"
      ],
      "description": "Symbol of the asset paid, e.g. USDC."
    },
    "amountAtomic": {
      "type": [
        "string",
        "null"
      ],
      "pattern": "^[0-9]+$",
      "description": "Amount in the asset's smallest unit, e.g. 4000 for 0.004 USDC. Normalised into amount + currency before hashing."
    },
    "asset": {
      "type": [
        "string",
        "null"
      ],
      "description": "Asset contract address or identifier, used with amountAtomic."
    },
    "txRef": {
      "type": [
        "string",
        "null"
      ],
      "description": "Settlement reference: transaction hash (EVM) or signature (Solana)."
    },
    "resource": {
      "type": "string",
      "minLength": 1,
      "maxLength": 2048,
      "description": "What was bought: the URL of the resource."
    },
    "method": {
      "type": "string",
      "minLength": 1,
      "maxLength": 16,
      "description": "HTTP method used, upper case."
    },
    "requestHash": {
      "type": "string",
      "pattern": "^[0-9a-fA-F]{64}$",
      "description": "sha256 of method + newline + url + newline + request body."
    },
    "responseHash": {
      "type": [
        "string",
        "null"
      ],
      "pattern": "^[0-9a-fA-F]{64}$",
      "description": "sha256 of the response body."
    },
    "responseStatus": {
      "type": [
        "integer",
        "null"
      ],
      "description": "HTTP status returned by the supplier."
    },
    "delivered": {
      "type": "boolean",
      "description": "Whether the supplier returned a successful response."
    },
    "sellerReceipt": {
      "type": [
        "object",
        "null"
      ],
      "description": "The supplier's own signed receipt (x402 offer-receipt extension), passed through unchanged."
    }
  }
}